watchValue on a get property

[matthewkooshad]

i have a class with ValueNotifier<bool> get valueNotifierFromToBeDeterminedClass.

since it's a situation where the class is to be determined, in my watchValue, i can't hardcode that class name in watchValue.

how can i do this? thanks

[escamoteur]

Just use the basic watch function and add a .value Am 15. Jan. 2024, 00:37 +0100 schrieb Matthew Kooshad @.***>:

i have a class with ValueNotifier get valueNotifierFromToBeDeterminedClass. since it's a situation where the class is to be determined, in my watchValue, i can't hardcode that class name in watchValue. how can i do this? thanks — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you are subscribed to this thread.Message ID: @.***>

[matthewkooshad]

ok, i've tried getting that syntax simply as you've stated, but unable so far. as i've exhausted the readme on the 5 examples of the basic watch function, i'll search around.

i think because my class is not extending Listenable interface and simply has a ValueNotifier property i'm trying to utilize as described.

even if i adjust the interface that the classes extend abstract class ITest<T> extends ChangeNotifier , this wouldn't work for my situation, as i can't code to the interface in the watch, but need to code to the decision logic function in the watch... which i don't see how to achieve.

[escamoteur]

Can you add a code snippet where you want to use it then I can show you Am 15. Jan. 2024, 17:21 +0100 schrieb Matthew Kooshad @.***>:

ok, i've tried getting that syntax simply as you've stated, but unable so far. as i've exhausted the readme on the 5 examples of the basic watch function, i'll search around. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you commented.Message ID: @.***>

[matthewkooshad]

thanks,

class _Test extends WatchingWidget {
  const _Test();

  @override
  Widget build(BuildContext context) {
    final isEditing = watch(TestHelper).isEditing; // wrong
    return Text(isEditing);
  }
}

class TestHelper{
  static ValueNotifier<bool> get isEditing {
    return determineClassToUse().isEditing;
  }
}

[escamoteur]

do it like this

class _Test extends WatchingWidget {
  const _Test();

  @override
  Widget build(BuildContext context) {
    final isEditing = watch(TestHelper.isEditing).value; 
    return Text(isEditing);
  }
}

class TestHelper{
  static ValueNotifier<bool> get isEditing {
    return determineClassToUse().isEditing;
  }
}

[matthewkooshad]

ah, i was close, thanks for the correction/help!

instead of: final isEditing = watch(TestHelper).isEditing; // wrong

this works: final isEditing = watch(TestHelper.isEditing).value;

thanks again